| David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1 | /* MTD backing device capabilities |
| 2 | * |
| 3 | * Copyright © 2006 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/backing-dev.h> |
| 13 | #include <linux/mtd/mtd.h> |
| 14 | #include "internal.h" |
| 15 | |
| 16 | /* |
| 17 | * backing device capabilities for non-mappable devices (such as NAND flash) |
| 18 | * - permits private mappings, copies are taken of the data |
| 19 | */ |
| 20 | struct backing_dev_info mtd_bdi_unmappable = { |
| 21 | .capabilities = BDI_CAP_MAP_COPY, |
| 22 | }; |
| 23 | |
| 24 | /* |
| 25 | * backing device capabilities for R/O mappable devices (such as ROM) |
| 26 | * - permits private mappings, copies are taken of the data |
| 27 | * - permits non-writable shared mappings |
| 28 | */ |
| 29 | struct backing_dev_info mtd_bdi_ro_mappable = { |
| 30 | .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT | |
| 31 | BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP), |
| 32 | }; |
| 33 | |
| 34 | /* |
| 35 | * backing device capabilities for writable mappable devices (such as RAM) |
| 36 | * - permits private mappings, copies are taken of the data |
| 37 | * - permits non-writable shared mappings |
| 38 | */ |
| 39 | struct backing_dev_info mtd_bdi_rw_mappable = { |
| 40 | .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT | |
| 41 | BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP | |
| 42 | BDI_CAP_WRITE_MAP), |
| 43 | }; |